DIN 53122 PDF
DIN Determination of the water vapour transmission rate of plastic film, rubber sheeting, paper, board and other sheet materials by gravimetry. DIN Testing of plastics and elastomer films, paper, board and other sheet materials – Determination of water vapour transmission. DIN ENG_机械/仪表_工程科技_专业资料。Determination of the water vapour transmission rate of plastic film, rubber sheeting.
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The same phenomenon will be observed if the humidity of the test atmosphere varies considerably during weighing. Evaporation chamber without dishes shown in figure 2 or 3 NOTE 2: The standard proposes the following climates: The test sample is mounted in a permeation cell so as to form the barrier between two chambers. Continued on pages 2 to 7.
Water vapor permeability (electrolysis method) DIN / DIN A
Aluminium dish Figure 3: Sealant, consisting of a wax mixture that adheres strongly to ddin the dish and the sample, is not brittle at the measuring temperature and is neither hygroscopic nor susceptible to oxidation.
Water or water vapour.
You find 35122 article here as a PDF. Please inform us, if your samples tend to mechanical 5312 under applied pressure of the test gas or the sealings. Since the water vapour transmission rate depends on factors that include the thickness and matrix of the sample material, it is not a material constant.
Use one of the following atmospheres in the evaporation chamber: This, however, is generally unnecessary in the case of non-hygroscopic film or sheets or of those having low water vapour transmission rates. The specimens shall be uniform in thickness, representative for the material and free of pinholes and folds. Subtract the blank values from the values measured for the sample dishes having undergone the same treatment.
We also do the test sample manufacture for you. In the case of products having an outer layer, determine the mass per unit area as described in DIN This can be remedied, for example, by increasing the mass of desiccant and repeating the test.
DIN Standard – Testing Instruments – Labthink
If these conditions are fulfilled, the water vapour transmission rate, WVTR, of similar samples of different thickness is inversely proportional to the thickness, i. The norm proposes a range of 0.
Based on this method Mecadi offers further examination to determine gas solubilities sorption and desorptiondiffusion coefficients and the measurement of break through times through barriers. Check that the increase in mass between two consecutive weighings is at least 5 mg.
Water vapor permeability WVTR (electrolysis method) according to DIN 53122-2 / DIN 53122-2-A
Use atmosphere B for rubber sheets, atmosphere D for plastic film and laminated paper, and atmospheres D and E for paper and board. If the samples have been prepared using solvents, residues of the latter left in the sample may affect the test results. Under refined test conditions e. It may also be due to sample defects and to differences in water vapour transmission rates in the case of samples with single-side or even double-side lamination.
Samples having a thickness greater than 3 mm shall be tested as specified in ISO Weigh the dish and sample and the 5312 if fitted to an accuracy of 0,1 mg, then place it in the evaporation chamber and remove the lid.
53212 undated dun, the latest edition of the publication referred to applies.
The detection limit also depends on the nature and thickness of the specimen. Then cover the dishes with the samples and firmly seal them to the dish wall, ensuring that the temperature of the sealant and any annular template used does not bring about any alteration in the sample.
Take the arithmetic mean of the individual values and report it to three significant places, but not to more than one decimal place.
See DIN for other methods of determining water vapour transmission rates e. The concentration is determined and the permeation rate is calculated.
Cookies make it easier for us to provide you with our services. In blank tests, examine samples having low permeation rate and large thickness e.
For different test gases and type of samples we use different sized samples. The amount of water vapour that passes through the test fin of the sample surface dkn is absorbed by the desiccant is determined by weighing the dish at dln intervals and recording the increase in mass.
The internal depth of the dish should be between 8 mm and 24 mm, but shall preferably be 15 mm. Amendments This standard differs from the November edition as follows. Testing method aplicable to nearly all materials, e. If you want to conduct the cutting of the specimens yourself, please contact us for the required dimensions. Balance, capable of weighing to an accuracy of 0,1 mg. A desiccator as shown in figure 1, for example, in a controlled-temperature or air-conditioned room may be used as evaporation chamber.
If the water vapour transmission rate is low, the thickness of the samples is large or the samples are very hygroscopic, one or two additional samples shall be prepared.